<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>JS练习</title>
</head>
<body>
  <button id="btn1">Button1</button>
  <div id="div1">
    <p id="p1">激活</p>
    <p id="p2">取消</p>
    <p id="p3">取消</p>
    <p id="p4">取消</p>
  </div>
  <div id="div2">
    <p id="p5">取消</p>
    <p id="p6">取消</p>
  </div>
  <div id="div3">
    <a href="#">a1</a>
    <a href="#">a2</a>
    <a href="#">a3</a>
    <a href="#">a4</a>
    <button>加载更多···</button>
  </div>
  <script src="事件绑定.js"></script>
</body>
</html>